671225642082 has 90 divisors (see below), whose sum is σ = 1531370600859. Its totient is φ = 219748041720.

The previous prime is 671225642071. The next prime is 671225642099. The reversal of 671225642082 is 280246522176.

671225642082 is a `hidden beast` number, since 6 + 7 + 1 + 2 + 2 + 564 + 2 + 0 + 82 = 666.

It can be written as a sum of positive squares in only one way, i.e., 335612821041 + 335612821041 = 579321^2 + 579321^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=579321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 615238357 + ... + 615239447.

Almost surely, 2^671225642082 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671225642082

671225642082 is an abundant number, since it is smaller than the sum of its proper divisors (860144958777).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671225642082 is an frugal number, since it uses more digits than its factorization.

671225642082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 671225642082 in words is "six hundred seventy-one billion, two hundred twenty-five million, six hundred forty-two thousand, eighty-two".